Material hopper



FIG. 1 is a perspective view of a material hopper showing our new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings are included for purposes of illustrating portions of the material hopper and form no part of the claimed design. 

CLAIM The ornamental design for a material hopper, as shown and described. 